It does remove some restrictive bottlenecks in the H pipe. The biggest advantage is how it smooths out the engine. No more lumpy V8 "cadence". It does not make the car louder. A nice addition that makes everything feel more refined..
2010-2012 3d Carbon grill with custom Hella 500 (driving) lamps installed in OEM fog lamp brackets with adjusters. Like new, Car sold. Complete with custom relay triggered wiring off the high beams or usable with your stock Fog pigtails. As a side benefit, this grill opens up the intake...